;; https://projecteuler.net/problem=34


;; Digit factorials
;; Problem 34

;; 145 is a curious number, as 1! + 4! + 5! = 1 + 24 + 120 =
;; 145.

;; Find the sum of all numbers which are equal to the sum of
;; the factorial of their digits.

;; Note: As 1! = 1 and 2! = 2 are not sums they are not
;; included.
